题目

 Lin Dan is ________athelet. I’m ________big fan of him. A. a ;the  B. an ;a  C. the ;an  答案：B China, a country with 145 million elderly people, will remain ________ aging society during this century, according to ________ Chinese population experts． [　　] A．the; 不填 B．an; 不填 C．an; the D．the; the